B12 Injection Frequency: How Often Should You Get a B12 Shot? Liv Hospital Lets do my first B12 injection together This is something Ive been nervous about for a long time, but today I finally did itand it honestly wasnt bad at all. I used the Union Medico needle guide B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics How to self inject intramuscular vitamin B12 Overview Guy's and St Thomas' NHS Foundation Trust Understanding Vitamin B12 Injections for Peripheral Neuropathy Vitamin B12 Self Administration Tutorial (thigh)